# types.JoinOptions.direction

- **Module:** types.JoinOptions
- **Package:** libtmux
- **Language:** TypeScript
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-ts/blob/3fe1ca654b81b8cbf4a13b777a001a3298c87a6f/packages/libtmux/src/types.ts#L316
- **Page:** https://libtmux.org/en/ts/latest/reference/types-joinoptions-direction/

Which side of the target the joined pane takes.

The same four choices `SplitOptions.direction` gives, for the same
reason: tmux reaches "above" and "left" only by pairing the axis with
`-b`, so a boolean names half of them. Combining this with `vertical`
throws `TypeError`.